C# SqlCeCommand异常
我有以下代码:C# SqlCeCommand异常,c#,sql,C#,Sql,我有以下代码: SqlCeConnection connection = new SqlCeConnection(conString); connection.Open(); connection.CreateCommand(); cmd.CommandText = "CREATE TABLE Settings (id int IDENTITY PRIMARY KEY, host nvarchar(50), port int, rk_host nvarchar(50), rk_port int,
SqlCeConnection connection = new SqlCeConnection(conString);
connection.Open();
connection.CreateCommand();
cmd.CommandText = "CREATE TABLE Settings (id int IDENTITY PRIMARY KEY, host nvarchar(50), port int, rk_host nvarchar(50), rk_port int, stationcode int, guesttypecode int)";
cmd.ExecuteNonQuery();
cmd = connection.CreateCommand();
cmd.CommandText = "INSERT INTO Settings ([host], [port], [rk_host], [rk_port], [stationcode], [guesttypecode]) VALUES ('" + Settings.host + "', '" + Settings.rk_host + "', '" + Settings.rk_port + "', '" + Settings.port + "', '" + Settings.stationcode + "', '" + Settings.guesttypecode + "')";
cmd.ExecuteNonQuery();
connection.Close();
在第二个ExecuteNonQuery
中,我遇到了一个异常:“数据转换失败。[OLE DB状态值(如果已知)=2]”
有人能帮我吗?对于Int类型的列,您应该从查询中删除单引号
cmd.CommandText = "INSERT INTO Settings ([host], [port], [rk_host], [rk_port], [stationcode], [guesttypecode]) VALUES ('" + Settings.host + "', '" + Settings.rk_host + "', " + Settings.rk_port + ", '" + Settings.port + "', " + Settings.stationcode + ", " + Settings.guesttypecode + ")";
第一个建议是永远不要这样写你的查询,因为那样会导致。其次,您正在读取设置并将它们插入表中,而不考虑它们的类型。您需要先输入转换(例如,
int.Parse(Settings.port)
停止向SQL中输入值。请改用参数化SQL命令。